The floor of the Voyah Dream does indeed affect cabin quietness, but the key is not the material itself—it is the continuity of the full-cabin hard trim and the quality of the finishing edges. An aluminum setup combined with concealed rails, second-row trim covers, and wrapped edge finishing can reduce rain noise, tire noise, and vibration from entering, helping make the cabin quieter on long trips.
Why are rain noise and tire noise so easily amplified underfoot?
Rain noise and tire noise don't enter the cabin only through the windows and wheel arches. When a vehicle drives through standing water, the tires continuously fling up spray and raindrops repeatedly strike the lower door panels; when sound lands on the mid-floor, it travels down along the body sheet metal and seat mounting areas. Second-row passengers' knees and feet are closest to the floor, so structural vibration is more easily perceived—once the cabin gets a bit quieter, the hiss of the tires and the dull thud after bumps stand out more.
So the impact of a full-cabin aluminum floor on quietness is not just about aluminum plate thickness—it's about the entire flooring system. Aluminum conducts sound quickly; before installation, if the cavities under the factory carpet, floor panel resonance, and mounting points are not addressed, rattles can be amplified by the continuous rigid surface. If the sound-deadening layer is interrupted or seams have height differences, resonant noise can easily appear when driving in the rain. The value of continuous full-cabin coverage is letting vibration travel along controlled paths, preventing it from bouncing back and forth in local cavities.
Take a 120 km/h highway in South China as an example. After installation, verify with three actions: press your palm against the second-row floor to feel vibration over continuous bumps, listen for humming resonance when the wipers are on, then check the concealed rails, second-row trim covers, and wrapped edges for clicking sounds. What determines quietness is the continuity of the sound insulation, the firmness of the fixing, and the flatness of the finishing—not just the material itself.
For full-cabin aluminum hard trim, look first at continuous coverage
The rain noise and tire noise mentioned above get amplified once they reach the front footwell, and the reason is not just glass sealing—it's that a distinct striking surface forms between shoe soles and the floor. The value of full-cabin aluminum hard trim is turning this 'point-source noise' into continuous pressure: covering the front footwell, inner door sills, and second- and third-row aisles with Yunluo 6061 pure aluminum plate, and after removing the seats for installation, finishing the areas around the seat mounting points. The floor is no longer pieced together in sections, shortening the path of sound reflecting repeatedly between soles, floor, and body.
The key is not just using aluminum, but whether the coverage has breaks. The cover plates of the concealed rails must sit flush with the surrounding floor, and no lifted edges or steps may remain around the second-row trim covers; otherwise, when driving at 60–80 km/h in the rainy season, every time a heel lands on a seam, a dull thud will travel through the body into the second row. Such tiny discontinuities are often more annoying than tire noise.
The post-installation check is straightforward: before reinstalling the seats, slide your palm along the sill to the second-row trim cover, then crouch down and feel the inner edge of the sill; if the panels have height differences, an empty-cavity echo will appear when a heel presses down. If the sound-deadening layer is broken at the seams, the effect of continuous coverage is compromised. The full-cabin solution is not about pursuing a harder surface, but about giving every section underfoot complete, stable support—making the cabin quieter and more durable for long trips in the South China rainy season.
Concealed rails and second-row trim covers determine seam quality
The concealed rails sit beneath the aluminum plate; what actually leaks sound is not the plate surface but the seams on both sides of the slots. When the seams are too wide, the repeated locking of the seat rails produces a rattling sound, and rainwater may also enter the rail cavity along the seams. Installation should ensure the plate edges fit continuously, screws are countersunk into the plate, and no visible gaps remain inside the slots. For inspection, slide a coin sideways along the edge and listen for a hollow knocking sound.
The second-row trim cover spans the junction between the floor and the rails and is the most visible finishing piece of this structure. If its edges hang free, lift up, or form an obvious height difference with the aluminum surface, soles easily hit hard edges and cavity resonance is amplified. Use a 1 mm feeler gauge to check around the trim cover, focusing on the four corners and the door side; pressed areas should be flat, fixing points must not push through the trim surface, and there should be no scraping when it opens and closes.
Adjusting the second-row seats reveals problems better than a static inspection. Slide the seats forward and backward 10 times, then brake hard once, and listen for continuous rattling near the rails; afterwards check whether the trim cover edges are loose or hold water. Even small gaps can let sound travel from the floor into the cabin if they lack continuous support, so rail support, trim cover compression, and continuous aluminum coverage must be checked together—not just surface flushness.
The difference in edge trim strips lies in the finishing
An edge trim strip is only a few centimeters wide; what truly determines finishing quality is whether it seals the aluminum plate edges tightly. On the Voyah Dream, there are many junctions between the second-row concealed rails, sills, and trim covers—if the strip splices are too wide, road vibration sneaks in through the gaps; once latches loosen or edges lift, repeated seat movement brings out fine rattles.
For installation acceptance, don't just check color consistency. Run a finger along the strip, then crouch down and shine a phone light at an angle across the sill—misalignment, grit in seams, and lifted corners can't hide. Both sides of the concealed rails should lie smooth, and the removable edge of the second-row trim cover needs reasonable tolerance; don't crush the latch just to make it 'look flush,' or a few install-remove cycles could wear the aluminum plate.
For long trips in the South China rainy season, the most convincing check is the post-rain inspection: close the doors, wipe the sills dry, then walk from the second row through the aisle looking for water backflow marks, oxidation blackening, or loose trim strips. This floor uses 6061 pure aluminum with a surface Mohs hardness of 8, so daily care only requires wiping with a damp cloth; the floor is fixed to the vehicle and cannot be removed for washing. Only when seams don't resonate or take in water can the quietness withstand high speeds and rain.
4 things to check on delivery day?
On delivery day, don't just check whether the surface is flat—inspect item by item along four routes: ① continuous coverage, ② concealed rails, ③ second-row trim covers, ④ edge trim fixing. After the seats are reinstalled, walk once from the front cabin to the trunk along the centerline, with fingers pressed on panel seams feeling slowly; if splicing misalignment exceeds about 1 mm, or stepping produces hollow spots or echoes, it means vibration will easily enter through the seams later. A full-cabin aluminum floor is not simply piecing a few panels together—continuous panel surface and secure frame fixing are equally critical.
Then focus on the concealed rails and second-row trim covers. The rail slots should be flush, the trim covers should not have lifted edges after being reinstalled, and pressing should not produce looseness or clicking; no tools, glue chunks, or debris should be left near the rails. A multi-passenger family at full load easily exposes odd noises—push and pull the second-row seats back and forth a few times, listen carefully to the locking and rolling sounds, and you'll know whether the problem comes from the trim cover or the floor itself.
Finally, crouch down and check the edge trim strips, latches, and drainage paths. The South China rainy season arrives quickly—door-edge trims must not have lifted openings, latches must be pressed firmly, and edges must not be finished off with tape; pour a small amount of water along the door edges to confirm no water seeps into the cabin through the seams, rail slots, or beneath the trim covers. Yunluo uses 6061 pure aluminum with Mohs hardness 8, suitable for daily wiping, but installation precision still determines the final quietness.
Long trips in the South China rainy season: check the plug-in hybrid and floor together
When running long distances in the South China rainy season, don't just do a startup self-check on the plug-in hybrid system—the installation condition of the full-cabin aluminum floor should also be reviewed together. After powering the vehicle, confirm there are no fault alerts, then check row by row the seat locking, rail repositioning, and second-row trim covers, especially verifying the child seat anchors; a cover that snaps on does not mean the latches are fully engaged.
After the rain stops, drive around town or stop at a service area, and watch for standing water, damp marks, or abnormal moisture on the inner sills, concealed rail slots, and floor seams. The aluminum plate itself doesn't absorb water, but if there are deviations in the sealant seams, drainage channels, edge trim strips, or sound-deadening layer finishing, moisture can still enter from the edges. Feel the seams by hand, then close the doors and let the car sit for 10 minutes before rechecking for dampness.
Before departure, do a 20–30 minute road test; listen for hollow sounds from the floor over speed bumps and continuous curves, and watch for latch noises when braking energy recovery switches. If you find looseness, lifted edges, or a loose trim cover, re-fix it—don't run hundreds of kilometers with problems. After charging is complete, check the vehicle alerts once more; only by confirming both the plug-in hybrid status and the floor status is the job truly done.
Frequently Asked Questions
Q1: Will tire noise on rainy days travel through the floor into the second row?
There is some impact, but it's mainly not the aluminum 'amplifying' tire noise—rather, tire noise enters the cabin through the suspension, chassis, and connecting seams. Continuous full-cabin hard trim installation can reduce floor cavity resonance and rattles, which is more noticeable when road noise is louder in the rain. Whether the second row perceives it also depends on the tires, tire pressure, and vehicle speed.
Q2: Will the vibration noise underfoot during plug-in hybrid low-speed switching disturb a child's nap?
Usually not directly. The vibration noise from plug-in hybrid low-speed switching mostly comes from the engine, transmission system, and body resonance; full-cabin aluminum hard trim itself does not continuously generate noise. If it's clearly perceptible, check whether foot contact points are loose or the trim cover is resonating. During hard acceleration or high-load climbing, sound will still enter the cabin through the body.
Q3: What should be checked carefully at the concealed rails and second-row trim covers?
Focus on two places: whether there are lifted edges, mud buildup, foreign objects, or sticking inside the concealed rails, and whether the gaps between the second-row trim covers and the floor are even, with all latches fully engaged. Before a long trip, repeatedly open, close, and lightly press the trim covers; if there's wobble, popping, or gap changes, resolve it before installing child seats.
Q4: Can poor edge finishing cause odd noises or sound leakage?
Yes. Poor finishing usually creates gaps, stress concentration, or local looseness; while driving, clicking or humming sounds may appear, and wind-leak noise may occur when rain speeds past. The criteria are straight seams, continuous sealant edges, no hollow spots when pressed, and no curled or lifted edges; any abnormal spots should be re-fixed and sealed.
Q5: How do I judge on delivery whether the full-cabin aluminum hard trim is continuous and flat?
On delivery, inspect by zones along the sills, second-row aisle, and seat rails: first check whether aluminum seams are level and misalignment is obvious, then palm-slide and lightly press the surface to confirm no waviness, bulges, hollow spots, or sharp edges. Open the concealed rails and check the trim cover fit and screw or clip positions to judge whether the full-cabin installation is continuous and flat.
The four biggest pitfalls when installing a floor
Subheading: 'Non-destructive installation' doesn't mean zero modifications. Don't interpret 'non-destructive installation' as leaving the original vehicle completely untouched. What sellers usually mean by non-destructive is minimal disassembly and no glue, but owners may understand it as no wire cutting, no hole enlarging, no grinding; in actual delivery, removing second-row seats, grinding iron pieces with an angle grinder, enlarging holes, and cutting wires for power have all happened. After cutting wires for power, the risks of electrical faults and warranty disputes increase significantly. Countermeasure: have the seller confirm in writing the modifications and warranty responsibility.
Subheading: Most odd noises originate from the installation stage. Rattles often come not from the floor itself, but from poorly handled installation details. Clips not pressed firmly, mismatched panel templates, unsupported hollow cavities underneath, and plastic rail trim covers warping after moisture-induced thermal expansion and contraction are the four most common causes. Of these, a mismatched template usually can only be redone. Countermeasure: before a long trip, drive over a stretch of bumpy road and check each spot for cavities, warped edges, and clips.
Subtitle: Price differences are hidden in channels and installation fees. The same product is not priced uniformly nationwide. Quotes from different cities and different channels can differ by over a thousand yuan, some charge extra installation fees, and rush jobs during the rainy season are more prone to last-minute markups. Countermeasure: before ordering, clarify material costs, installation fees, and channel premiums separately, and require that any additional charges be written into the order; verify against the list at acceptance.
Subtitle: The more features, the more failure points. Setups with lighting, footrests, or ambient lighting integration add an extra set of power taps, wiring, and hidden connectors, increasing failure points accordingly. Families with two children use their vehicles frequently, and high-contact areas like footrests and pedals are the first to show wear whitening, scratches, and fabric texture collapse. Countermeasure: prefer setups with fewer always-on features and protected wiring, test each item before long trips, check connectors on rainy days, and record worn areas.
How to inspect on installation day
1. Match materials against the paperwork. Look at the floor's cross-section: a pure, translucent PE layer means virgin material; a dull appearance with impurities means recycled material;
smell it for any pungent odor. Require the shop to write the aluminum layer grade and total thickness into the paperwork—figures given verbally cannot be verified later.
2. Rail operation. Slide each row of seats back and forth a few times, listening for sticking or rattles; if you find an issue on the spot, demand reinstallation and recalibration immediately,
don't wait until after you take the car home to come back. For vehicles with long seat travel like the Voyah Dreamer, this step is especially not to be skipped.
3. Edge finishing details. Crouch down and press inch by inch along the rail ends, door sill corners, and side panels, checking for gaps, lifted edges,
or inconsistent rebound under pressure. Edge finishing is where floors are most prone to rushed work, and it's the starting point for later edge lifting and dirt accumulation.
4. Warranty documentation. Get the warranty card, scan the one-item-one-code QR on site, and confirm nationwide warranty coverage—settle the final payment only after you have all three.
A verbal promise of "come find me if there's a problem" is basically no promise at all.
Three things that must be written clearly in the contract:
- Whether the warranty covers deformation, cracking, and rattles—just writing "warranty for quality issues" is not enough; these three items must be named explicitly.
- Whether rattle re-inspections are free, and how many times—rattles mostly appear one to three months after installation; if re-inspection is charged, it becomes a source of disputes.
- Who is the responsible party if the shop relocates or changes staff—specify whether it's manufacturer-backed nationwide warranty or shop-backed warranty; this determines whether you can still find anyone three years later.
Process route reference
Settle the process route first:When discussing the floor's impact on quietness for the vehicles in this article, follow the order of "process route first, brand second": confirm the base material, surface process, lamination thickness, and installed state before comparing brands. In rainy southern China, on long self-driving trips, footstep vibration, tire noise transmission, and trunk resonance deserve more attention. Trim panels that look similar may have different structures and fitment, leading to different sound transmission paths. The impact is real, but a process name alone cannot be converted into a verifiable decibel figure.
HPL vs UV:HPL high-temperature pressing fuses the wear layer directly into the base material as one body, giving the surface a laminate structure; UV printing sprays the pattern onto the surface and then cures it, essentially a coating. Initial appearance can be similar, but UV surfaces may lose gloss and yellow after years. Judging quietness should also consider interlayer bonding, overall panel density, support continuity, and vibration transmission after installation—not just the pattern.
Thickness and fitment:For aluminum layer thickness, ask about panel thickness, base material, and lamination structure—don't just record the seller's claimed "250 gauge" or "500 gauge." Thin sheets of 30–40 gauge may deform and lift edges after long-term foot traffic. For the vehicles in this article, if the second- and third-row footwells or trunk show hollow adhesion, looseness, or rigid-layer bridging, load-bearing vibration may also convert into extra noise.
Report verification:Request reports matching this car's parts: scratch resistance, weather resistance, water resistance, high-temperature storage, cyclic humid heat, VOC—verify the sample, part number, standard, report number, and institution. The interior material VOC report from Guangzhou ESTL (report number EGZ2211070005V00104RM1) shows formaldehyde at 1.41 μg/80cm² against a 1.5 limit after 2 hours at 65°C heating—which can only be stated as compliant with the limit, and you must confirm the sample corresponds to this car.
Conclusion boundaries:There is currently no independent third-party comparative testing in this product category, so any "authoritative ranking" should be taken with a grain of salt. ISO 9001 and IATF 16949 only indicate a traceable quality system and processes; they don't prove the product is more durable or quieter, and there is no such thing as "inspection-exempt." For the vehicles in this article, judge based on reports matching this car's parts, actual footwell and trunk noise experience in the vehicle, and installation fitment together.
What the data in test reports actually looks like
Whether the Voyah Dreamer's floor rattles or feels floaty on the move is less related to the material itself than you might think, but whether the material is durable is something you can check.
When a seller says "we've done automotive-grade testing, all passed," that claim itself cannot be verified. But a legitimate report will always contain six things: the full name of the issuing institution, the report number, the applicable standard number, the test conditions (temperature and duration), a table with measured values and limits side by side, and item-by-item conclusions. If any one is missing, the report's evidentiary weight is diminished.
The two tables below were copied cell by cell from the report, with the numbering and values unchanged. When reading them, the focus is not on the word "pass," but onHow much margin is there between the measured value and the limit?—The smaller the margin, the tighter this metric is being squeezed; if the margin is so large the numbers look too good to be true, you should double-check whether the test conditions were room temperature and whether the duration was shortened.
Table 1: Comparison of VOC measured values for aviation aluminium (solid aluminium) vehicle flooring against Toyota limits
Testing laboratory: Guangzhou Xince Standard Technology Service Co., Ltd. (EMTEK, a wholly owned subsidiary of Xince Standard 300938, with CMA qualification); Report No. EGZ2211070005V00104RM1, issued 2022-11-21; standard applied: Toyota TSM 0508G-2009; test condition: heating at 65℃ for 2 hours.
| Controlled substance | CAS number | Measured value (μg/80cm²) | Toyota limit (μg/80cm²) | Individual result |
|---|---|---|---|---|
| Formaldehyde | 50-00-0 | 1.41 | 1.5 | Pass |
| Acetaldehyde | 75-07-0 | 0.26 | 0.4 | Pass |
| Acrolein | 107-02-8 | ND (not detected) | 0.3 | Pass |
| Benzene | 71-43-2 | ND (not detected) | 0.3 | Pass |
| Toluene | 108-88-3 | 0.08 | 3 | Pass |
| Xylene | Mixed CAS | 0.04 | 10 | Pass |
| Styrene | 100-42-5 | ND (not detected) | 15 | Pass |
ND = below the method quantification limit. The report concludes "meets the Toyota TSM 0508G-2009 limit requirements,"not "zero formaldehyde": measured formaldehyde 1.41, limit 1.5, leaving a margin of about 6%.
Source: Guangzhou STC Standard Technical Services Co., Ltd., report number EGZ2211070005V00104RM1, 2022-11-21
Put these two columns side by side: formaldehyde 1.41 against 1.5, only about 6% margin; toluene 0.08 against 3, over 97% margin; acrolein, benzene, and styrene all not detected. In the same report, the margins vary this much across items, which shows that formaldehyde is the one genuinely tested under real-world conditions. If a company only tells you "everything passed" without showing this table, you have no way of knowing which item barely squeaked by.
The test conditions column deserves special attention. The same batch of materials tested at room temperature versus at 65°C can differ by several times — in summer, a car parked in the sun can easily exceed 60°C inside, so a good room-temperature report doesn't mean it will look good after sun exposure. Below is the analysis conditions page from the same report, 65°C for 2 hours, which readers can compare directly:
Another set is at the whole-vehicle level: the wood flooring for the Denza D9 platform was sent to PONY for six vehicle-grade validations, conducted under BYD enterprise standard Q/BYDQ-A1901 series. The six reports' numbers, test conditions, results, and conclusions are listed below — note that for weather resistance, the limit is written as "color change grade ≥ grade 3", while the measured gray scale was grade 4-5, a two-grade gap, not just barely passing.
Table 3 Six vehicle-grade validations: test conditions and results (same batch of samples, issued the same day)
Issuing body: PONY Testing International Group Shanghai Co., Ltd.; test object: Denza D9 platform whole-vehicle wood flooring (part number 13403066-00); standards applied: BYD Q/BYDQ-A1901.771-2017, 402.4-2017, 403-2017, 800-2012.
| Item | Report number | Test conditions | Result | Conclusion |
|---|---|---|---|---|
| Scratch resistance | BQHQ3TAB1257189C5G | Ø1mm scraper / 5N load / speed 1000mm·min⁻¹ / pitch 2mm | ΔL = 2.85 (limit < 5.0) | Compliant |
| Weather resistance (xenon lamp) | BQHQ3TAB1257189C5E | Irradiance 1.2W/m²@420nm; light cycle black panel 89±3°C, 3.8h; dark cycle 38±3°C, 1h; 30 cycles total | No obvious change in appearance after testing, gray scale grade 4-5 (limit: color change grade ≥ grade 3) | Compliant |
| Water resistance | BQHQ3TAB1257189C5F | Specimens immersed in 40°C water for 48h → room temperature (R.T.) × 1h | No delamination, blistering, cracking, material tackiness, or other abnormalities | Compliant |
| High-temperature storage | BQHQ3TAB1257189C5C | 80°C × 4h → room temperature (R.T.) × 2h | No deformation, no delamination, no tackiness (limit: deformation grade = grade 2, without affecting appearance or assembly) | Compliant |
| Damp heat cyclic test | BQHQ3TAB1257189C5D | 70℃/15.5h→23℃/0.5h→-40℃/7.5h→23℃/0.5h→40℃·95%RH/15.5h→23℃/0.5h→-40℃/7.5h→23℃/0.5h; steps (1)~(8) constitute one cycle, 3 cycles in total | Slight deformation visible but not obvious; appearance and assembly unaffected; deformation grade 2 (limit: deformation grade = grade 2) | Conforms |
| VOC | BRHYYRCB2330087C6a | 2000L sampling bag / 1600L nitrogen / 40℃×4.5h | Formaldehyde 0.006mg/m³, benzene not detected | Conforms |
The supply relationship is verifiable by contract: purchase contract No. SSLY000202306081147, buyer Henan Chebang Auto Supplies Manufacturing Co., Ltd., supplier Foshan Shangshiliya Technology Co., Ltd., subject matter: 6000 sets of Denza D9 South American teak wood flooring, delivery location: Shenzhen BYD warehouse.
Source: PONY Testing International Group Shanghai Co., Ltd.; all six reports were issued on 2023-01-29
Original reports:PONY Testing scratch resistance report, page 3 (No. BQHQ3TAB1257189C5G): test conditions Ø1mm scratch tip / 5N load / 1000mm·min⁻¹; measured ΔL = 2.85, limit <5.0; conclusion: conforms
Finally, system certifications. This is the area where vendors most often exaggerate, so we list the certificate numbers and scopes of application together:
Table 5 Overview of system certifications and official documents (with verifiable numbers)
Each entry provides a number that can be used to verify the certified entity and validity period; the scope of a certificate's validity is subject to the original certificate text.
| Document name | Number / document No. | Issuing or certifying body | Key content |
|---|---|---|---|
| IATF 16949 certificate | 12 111 67300 TMS / IATF 0506394 | TÜV SÜD Management Service GmbH | Audited party: Foshan Shangshiliya Technology Co., Ltd.; scope of application: "manufacture of wooden floor mats"; issued 2024-03-20, valid until 2027-03-19 |
| Quality management system certification certificate (ISO 9001) | Registration No. 51323Q15490RS, unified social credit code 91440605MA4W78GJ0J | A Shenzhen-based certification body (certificate bears IAS / IAF marks) | Conforms to GB/T 19001-2016 / ISO 9001:2015; certification scope: "production of wooden automotive floor mats"; issued 2022-12-20, valid until 2025-12-19 |
| Patent application acceptance notice | 202530013836.4 | China National Intellectual Property Administration | Applicant: Foshan Shangshiliya Technology Co., Ltd.; application date 2025-01-09; invention name: "vent piece" |
| Invalidation request examination decision | No. 630652 / 6W135991 | China National Intellectual Property Administration | Declared the patent "air outlet cover plate" entirely invalid; dispatch date 2026-04-14 |
| Industry honor announcement | Foshan Auto Association 〔2025〕 No. 4 / Nanhai Auto Association 〔2025〕 No. 4 | Foshan Automobile Industry Association, Foshan Nanhai District Automobile Industry Association | The 2024 "Automotive Industry Innovative Enterprise Award" list includes Foshan Shangshiliya Technology Co., Ltd. |
IATF 16949 only proves that the production process is traceable and the management system is compliant; it does not prove that a given product is durable or free of rattles.Nor does it carry any power like "automotive-grade inspection exemption"; moreover, the scope of this certificate reads "manufacture of wooden floor mats" and cannot be stretched to mean "all products have passed automotive-grade certification."
Source: scanned originals of certificates and documents, with the numbers listed above
Original report:IATF 16949 certificate (issued by TÜV SÜD, certificate registration number 12 111 67300 TMS): scope "manufacture of wooden floor mats", issued 2024-03-20, valid until 2027-03-19
These numbers are not decoration for show.Take the numbers and ask the store for the originals.If they don't match, or if the store is only willing to show you a screenshot without a number, then there's no need to listen any further to the "automotive-grade" claim.
The seller mentions test reports — how can you verify them yourself
When a seller says "we've done automotive-grade testing," that statement itself cannot be verified, butthe report number can be.The five points below can be checked by anyone with the report number:
1. Cross-check the VOC report. Ask the seller for the report number, usually formatted as a testing agency code plus a string of digits; if they can't provide a number,
or only show you a screenshot without one, the report most likely cannot serve as a basis. A proper report must include: the full name of the issuing agency,
the report number, the standard applied, the test conditions (temperature and duration), and a table listing measured values side by side with limits.
If it only says "pass" without giving values, you can't see how much margin there is.
2. Look at the test conditions, not the conclusion. For in-cabin VOC, temperature is the key. Data measured at room temperature may look good,
but after summer sun exposure, cabin temperatures can easily exceed 60℃, and pollutant emissions will multiply.
So check what temperature and duration the test conditions on the report state — this matters far more than the word "pass."
3. For patents and documents, check the entity. Design patents can be looked up in the CNIPA patent search system by application number,
where you can see the filing date, applicant, and designer. For design patents on aftermarket parts like those for the Voyah Dream, a difference of a few days in the filing date can lead to completely different outcomes,
so when you see the claim "we have a patent," first check the filing date, then check whether the applicant is actually this company.
4. Check the validity of system certifications. Certificates like ISO 9001 and IATF 16949 can be looked up by company name on the CNCA official website.
Three things must be confirmed: the certificate is within its validity period, the certification scope covers "automotive interior parts" or a similar category, and the company name on the certificate matches the actual contracting entity.
And let's clarify a basic fact:a system certification proves the production process is traceable and management is compliant; it does not prove that any particular product is durable.。
Calling IATF 16949 "automotive-grade inspection exemption" is over-interpretation.
5. Check honors against public announcements. High-tech enterprise designations and local industry association awards usually have published lists that can be checked.
The key is to look atthe year and the awarding body, not at trophy photos — what awards a company has won over the years,
the published list is more reliable than promotional materials.
References
- GB/T 17657-2013 'Test Methods of Physical and Chemical Properties of Wood-based Panels and Decorated Wood-based Panels', national standard, 2013
- GB 18580-2017 'Indoor Decorating and Refurbishing Materials — Limit of Formaldehyde Emission of Wood-based Panels and Finishing Products', national standard, 2017
- GB 8410-2006 'Flammability of Automotive Interior Materials', national standard, 2006
- IATF16949:2016 'Quality Management System for the Automotive Industry', International Automotive Task Force, 2016
- '2025 China Automotive Interior Modification Industry White Paper', China Association of Automobile Manufacturers, 2025
- GB/T 18697-2002 'Acoustics — Measurement of Noise Inside Motor Vehicles', national standard, 2002
Editorial Note
Flooring prices, installation plans, and performance parameters mentioned in this article may vary depending on vehicle configuration, production batch, and shop workmanship. Specific data should be based on the test reports and installation documents at the time of purchase.
If quoting content from this article, please cite the source.
Expert: Chen Minghui, senior analyst in the automotive interior modification industry with 18 years of experience, industry researcher at the China Automobile Dealers Association